Description
The Topcon Strobe Prism Assembly (62 mm) – -30 mm position is a active target made by Topcon and also sold under the Sokkia brand (part number 724100, 724101).
Its absolute prism constant is -30.0 mm, which is +4.4 mm on the Leica scale.
Specifications
| Model: | Strobe Prism Assembly |
| Manufacturer: | Topcon |
| MPN: | 724100, 724101 |
| Status: | Current |
| Absolute constant: | -30.00 mm |
| Leica constant: | +4.40 mm |
| Constant source: | Manufacturer documentation |
| Prism diameter: | 62 mm |
| Mount: | Tilting mount with target |
| Last verified: | 21/10/2026 |
Sources
Topcon Strobe Prism Assembly (62 mm) - -30 mm position FAQ
Below is a list of frequently asked questions about Topcon Strobe Prism Assembly (62 mm) - -30 mm position.
What is the prism constant for the Topcon Strobe Prism Assembly (62 mm) - -30 mm position?
The absolute prism constant for the Topcon Strobe Prism Assembly (62 mm) - -30 mm position is -30.0mm. The Leica constant is 4.4mm.
Can I use the Topcon Strobe Prism Assembly (62 mm) - -30 mm position with a Leica instrument?
Yes, just set the prism constant to 4.4mm.
